#3139B3#3139B3

#3139B3 is a dark, vivid blue. Relative luminance 0.068; OKLCH L 42.5% C 0.189 H 272.2°. Best body text is #FFFFFF at 8.87:1 contrast (WCAG AA passes).

Color values

HEX	#3139B3
RGB	rgb(49, 57, 179)
HSL	hsl(236, 57%, 45%)
HSV	hsv(236, 73%, 70%)
CMYK	cmyk(72.6%, 68.2%, 0%, 29.8%)
CIE-LAB	lab(31.42, 38.24, -65.41)
CIE-LCH	lch(31.42, 75.77, 300.31°)
OKLab	oklab(42.45% 0.0074 -0.1891)
OKLCH	oklch(42.45% 0.189 272.2)
XYZ	xyz(10.8637, 6.8328, 43.3854)
Luminance	0.0683 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3139B3 #B3AB31

analogous

#317AB3 #3139B3 #6A31B3

triadic

#3139B3 #B33139 #39B331

tetradic

#3139B3 #B3317A #B3AB31 #31B36A

square

#3139B3 #B3317A #B3AB31 #31B36A

split-complementary

#3139B3 #B36A31 #7AB331

monochromatic

#171A53 #242A83 #3139B3 #5259D0 #8287DD

Accessibility & contrast

On white

8.87

#3139B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.37

#3139B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3139B3

8.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3139B3	#FFFFFF	#000000	##FFFFFF
##3139B3	1.00	8.87	2.37	8.87
#FFFFFF	8.87	1.00	21.00	1.00
#000000	2.37	21.00	1.00	21.00
##FFFFFF	8.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050B7

Deuteranopia (green-blind)

#0044B1

Tritanopia (blue-blind)

#005A71

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #3139b3;
/* rgb */ color: rgb(49, 57, 179);
/* oklch */ color: oklch(42.5% 0.189 272.2);

Tailwind

colors: {
  custom: {
    50: '#7c70cb',
    500: '#3139b3',
    950: '#000000',
  },
}

SCSS

$custom: #3139b3;
$custom-light: #7c70cb;
$custom-dark: #000000;

JSON

{
  "hex": "#3139b3",
  "rgb": {
    "r": 49,
    "g": 57,
    "b": 179
  },
  "hsl": {
    "h": 236.308,
    "s": 57.018,
    "l": 44.706
  },
  "oklch": {
    "l": 0.42451,
    "c": 0.18928,
    "h": 272.2
  },
  "luminance": 0.06834
}

Semantic roles & 50–950 ramp

primary

#3139B3

secondary

#C6C17A

accent

#D748E0

background

#F8F6FC

surface

#EFECF9

border

#CAC7D2

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #3139B3

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →